Assessment of Soil Heave Stabization Using Salty Water Technique

Abstract

Cyclic of heave and settlement of expansive represent one of the main reasons to considerable damages of structures, roads and highways. In Egypt there are many areas containing such expansive soils especially at the arid and semi-arid lands. Some studies used salty water with various concentrations to minimize the swelling behaviour of expansive clayey soils. In this paper an evaluation for the effectiveness of this technique was carried out based on series of lab experimental tests. Prepared remolded samples were treated with different concentration of salt water and the swelling behaviour, engineering properties, and heave parameters were studied using one-dimensional oedometer test. The effect of potable water on the dried-pretreated sample with salty water was also investigated. The results of the study indicated that, salt water treatment may be unpractical technique. Inundation with salty water may apparently minimize soil heave, however, soil treatment should be applied all through the lifespan of the structure, otherwise, when dry treated soil is subjected to seepage of fresh water, it may yield higher swelling potential.

Experimental Study on Behavioral Parameters of Expansive Soil Treated With Salt Water

“…compared to reference phase, a reduction of 12.5%, and an increase of 144% for readings at steel plate and top of soil respectively. Results show that immersion again in fresh water led the sample to yield and a great increase in heave to reach about 80 mm at top of soil, which represents 2.5 times the record value at the first stage (32.58 mm), that is in agreement with the findings results by[8].…”